CMake/Source/cmListFileCache.cxx

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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#include "cmListFileCache.h"
#include "cmListFileLexer.h"
#include "cmSystemTools.h"
#include "cmMakefile.h"
#include "cmVersion.h"
#include <cmsys/RegularExpression.hxx>
#ifdef __BORLANDC__
# pragma warn -8060 /* possibly incorrect assignment */
#endif
//----------------------------------------------------------------------------
struct cmListFileParser
{
cmListFileParser(cmListFile* lf, cmMakefile* mf, const char* filename);
~cmListFileParser();
bool ParseFile();
bool ParseFunction(const char* name, long line);
void AddArgument(cmListFileLexer_Token* token,
cmListFileArgument::Delimiter delim);
cmListFile* ListFile;
cmMakefile* Makefile;
const char* FileName;
cmListFileLexer* Lexer;
cmListFileFunction Function;
enum { SeparationOkay, SeparationWarning } Separation;
};
//----------------------------------------------------------------------------
cmListFileParser::cmListFileParser(cmListFile* lf, cmMakefile* mf,
const char* filename):
ListFile(lf), Makefile(mf), FileName(filename),
Lexer(cmListFileLexer_New())
{
}
//----------------------------------------------------------------------------
cmListFileParser::~cmListFileParser()
{
cmListFileLexer_Delete(this->Lexer);
}
//----------------------------------------------------------------------------
bool cmListFileParser::ParseFile()
{
// Open the file.
cmListFileLexer_BOM bom;
if(!cmListFileLexer_SetFileName(this->Lexer, this->FileName, &bom))
{
cmSystemTools::Error("cmListFileCache: error can not open file ",
this->FileName);
return false;
}
// Verify the Byte-Order-Mark, if any.
if(bom != cmListFileLexer_BOM_None &&
bom != cmListFileLexer_BOM_UTF8)
{
cmListFileLexer_SetFileName(this->Lexer, 0, 0);
cmOStringStream m;
m << "File\n " << this->FileName << "\n"
<< "starts with a Byte-Order-Mark that is not UTF-8.";
this->Makefile->IssueMessage(cmake::FATAL_ERROR, m.str());
return false;
}
// Use a simple recursive-descent parser to process the token
// stream.
bool haveNewline = true;
while(cmListFileLexer_Token* token =
cmListFileLexer_Scan(this->Lexer))
{
if(token->type == cmListFileLexer_Token_Space)
{
}
else if(token->type == cmListFileLexer_Token_Newline)
{
haveNewline = true;
}
else if(token->type == cmListFileLexer_Token_Identifier)
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{
if(haveNewline)
{
haveNewline = false;
if(this->ParseFunction(token->text, token->line))
{
this->ListFile->Functions.push_back(this->Function);
}
else
{
return false;
}
}
else
{
cmOStringStream error;
error << "Error in cmake code at\n"
<< this->FileName << ":" << token->line << ":\n"
<< "Parse error. Expected a newline, got "
<< cmListFileLexer_GetTypeAsString(this->Lexer, token->type)
<< " with text \"" << token->text << "\".";
cmSystemTools::Error(error.str().c_str());
return false;
}
}
else
{
cmOStringStream error;
error << "Error in cmake code at\n"
<< this->FileName << ":" << token->line << ":\n"
<< "Parse error. Expected a command name, got "
<< cmListFileLexer_GetTypeAsString(this->Lexer, token->type)
<< " with text \""
<< token->text << "\".";
cmSystemTools::Error(error.str().c_str());
return false;
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}
}
return true;
}
//----------------------------------------------------------------------------
bool cmListFile::ParseFile(const char* filename,
bool topLevel,
cmMakefile *mf)
{
if(!cmSystemTools::FileExists(filename))
{
return false;
}
bool parseError = false;
this->ModifiedTime = cmSystemTools::ModifiedTime(filename);
{
cmListFileParser parser(this, mf, filename);
parseError = !parser.ParseFile();
}
if(parseError)
{
this->ModifiedTime = 0;
}
// do we need a cmake_policy(VERSION call?
if(topLevel)
{
bool hasVersion = false;
// search for the right policy command
for(std::vector<cmListFileFunction>::iterator i
= this->Functions.begin();
i != this->Functions.end(); ++i)
{
if (cmSystemTools::LowerCase(i->Name) == "cmake_minimum_required")
{
hasVersion = true;
break;
}
}
// if no policy command is found this is an error if they use any
// non advanced functions or a lot of functions
if(!hasVersion)
{
bool isProblem = true;
if (this->Functions.size() < 30)
{
// the list of simple commands DO NOT ADD TO THIS LIST!!!!!
// these commands must have backwards compatibility forever and
// and that is a lot longer than your tiny mind can comprehend mortal
std::set<std::string> allowedCommands;
allowedCommands.insert("project");
allowedCommands.insert("set");
allowedCommands.insert("if");
allowedCommands.insert("endif");
allowedCommands.insert("else");
allowedCommands.insert("elseif");
allowedCommands.insert("add_executable");
allowedCommands.insert("add_library");
allowedCommands.insert("target_link_libraries");
allowedCommands.insert("option");
allowedCommands.insert("message");
isProblem = false;
for(std::vector<cmListFileFunction>::iterator i
= this->Functions.begin();
i != this->Functions.end(); ++i)
{
std::string name = cmSystemTools::LowerCase(i->Name);
if (allowedCommands.find(name) == allowedCommands.end())
{
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isProblem = true;
break;
}
}
}
if (isProblem)
{
// Tell the top level cmMakefile to diagnose
// this violation of CMP0000.
mf->SetCheckCMP0000(true);
// Implicitly set the version for the user.
mf->SetPolicyVersion("2.4");
}
}
}
if(topLevel)
{
bool hasProject = false;
// search for a project command
for(std::vector<cmListFileFunction>::iterator i
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= this->Functions.begin();
i != this->Functions.end(); ++i)
{
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if(cmSystemTools::LowerCase(i->Name) == "project")
{
hasProject = true;
break;
}
}
// if no project command is found, add one
if(!hasProject)
{
cmListFileFunction project;
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project.Name = "PROJECT";
cmListFileArgument prj("Project", cmListFileArgument::Unquoted,
filename, 0);
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project.Arguments.push_back(prj);
this->Functions.insert(this->Functions.begin(),project);
}
}
if(parseError)
{
return false;
}
return true;
}
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//----------------------------------------------------------------------------
bool cmListFileParser::ParseFunction(const char* name, long line)
{
// Inintialize a new function call.
this->Function = cmListFileFunction();
this->Function.FilePath = this->FileName;
this->Function.Name = name;
this->Function.Line = line;
// Command name has already been parsed. Read the left paren.
cmListFileLexer_Token* token;
while((token = cmListFileLexer_Scan(this->Lexer)) &&
token->type == cmListFileLexer_Token_Space) {}
if(!token)
{
cmOStringStream error;
error << "Error in cmake code at\n" << this->FileName << ":"
<< cmListFileLexer_GetCurrentLine(this->Lexer) << ":\n"
<< "Parse error. Function missing opening \"(\".";
cmSystemTools::Error(error.str().c_str());
return false;
}
if(token->type != cmListFileLexer_Token_ParenLeft)
{
cmOStringStream error;
error << "Error in cmake code at\n" << this->FileName << ":"
<< cmListFileLexer_GetCurrentLine(this->Lexer) << ":\n"
<< "Parse error. Expected \"(\", got "
<< cmListFileLexer_GetTypeAsString(this->Lexer, token->type)
<< " with text \"" << token->text << "\".";
cmSystemTools::Error(error.str().c_str());
return false;
}
// Arguments.
unsigned long lastLine;
unsigned long parenDepth = 0;
this->Separation = SeparationOkay;
while((lastLine = cmListFileLexer_GetCurrentLine(this->Lexer),
token = cmListFileLexer_Scan(this->Lexer)))
{
if(token->type == cmListFileLexer_Token_Space ||
token->type == cmListFileLexer_Token_Newline)
{
this->Separation = SeparationOkay;
continue;
}
if(token->type == cmListFileLexer_Token_ParenLeft)
{
parenDepth++;
this->Separation = SeparationOkay;
this->AddArgument(token, cmListFileArgument::Unquoted);
}
else if(token->type == cmListFileLexer_Token_ParenRight)
{
if (parenDepth == 0)
{
return true;
}
parenDepth--;
this->Separation = SeparationOkay;
this->AddArgument(token, cmListFileArgument::Unquoted);
this->Separation = SeparationWarning;
}
else if(token->type == cmListFileLexer_Token_Identifier ||
token->type == cmListFileLexer_Token_ArgumentUnquoted)
{
this->AddArgument(token, cmListFileArgument::Unquoted);
this->Separation = SeparationWarning;
}
else if(token->type == cmListFileLexer_Token_ArgumentQuoted)
{
this->AddArgument(token, cmListFileArgument::Quoted);
this->Separation = SeparationWarning;
}
else
{
// Error.
cmOStringStream error;
error << "Error in cmake code at\n" << this->FileName << ":"
<< cmListFileLexer_GetCurrentLine(this->Lexer) << ":\n"
<< "Parse error. Function missing ending \")\". "
<< "Instead found "
<< cmListFileLexer_GetTypeAsString(this->Lexer, token->type)
<< " with text \"" << token->text << "\".";
cmSystemTools::Error(error.str().c_str());
return false;
}
}
cmOStringStream error;
error << "Error in cmake code at\n"
<< this->FileName << ":" << lastLine << ":\n"
<< "Parse error. Function missing ending \")\". "
<< "End of file reached.";
cmSystemTools::Error(error.str().c_str());
return false;
}
//----------------------------------------------------------------------------
void cmListFileParser::AddArgument(cmListFileLexer_Token* token,
cmListFileArgument::Delimiter delim)
{
cmListFileArgument a(token->text, delim, this->FileName, token->line);
this->Function.Arguments.push_back(a);
if(delim == cmListFileArgument::Unquoted)
{
// Warn about a future behavior change.
const char* c = a.Value.c_str();
if(*c++ == '[')
{
while(*c == '=')
{ ++c; }
if(*c == '[')
{
cmOStringStream m;
m << "Syntax Warning in cmake code at\n"
<< " " << this->FileName << ":" << token->line << ":"
<< token->column << "\n"
<< "A future version of CMake may treat unquoted argument:\n"
<< " " << a.Value << "\n"
<< "as an opening long bracket. Double-quote the argument.";
this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, m.str().c_str());
}
}
}
if(this->Separation == SeparationOkay)
{
return;
}
cmOStringStream m;
m << "Syntax Warning in cmake code at\n"
<< " " << this->FileName << ":" << token->line << ":"
<< token->column << "\n"
<< "Argument not separated from preceding token by whitespace.";
this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, m.str().c_str());
}
//----------------------------------------------------------------------------
std::ostream& operator<<(std::ostream& os, cmListFileContext const& lfc)
{
os << lfc.FilePath;
if(lfc.Line)
{
os << ":" << lfc.Line;
if(!lfc.Name.empty())
{
os << " (" << lfc.Name << ")";
}
}
return os;
}